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ID Date Author Type Category Subjectup Text Attachments
  81   Mon Mar 25 19:31:16 2013 KojiOpticsGeneralOMC Top-side gluing[Koji Jeff Zach]  
AAA
 P3253353.jpgP3253372.jpgP3253394.jpgP3253400.jpg 
  69   Thu Mar 7 15:53:47 2013 KojiMechanicsGeneralOMC Transportation fixture, OMC PD/QPD mounts   P3073218.JPGP3073219.JPGP3073223.JPGP3073225.JPGP3073227.JPG 
  407   Fri Feb 5 07:40:37 2021 StephenSupplyGeneralOMC Unit 4 Build Machined PartsOMC Unit 4 Build Machined Parts are currently
located in Stephen's office. See image
of large blue box from office, below.
 IMG_8117.JPG 
  411   Wed Jul 7 14:21:50 2021 StephenSupplyGeneralOMC Unit 4 Build Machined PartsMore explicit insights into the inventory
for the Unit 4 build. Image of inventory
included below.
 IMG_9238.JPGIMG_9236.JPG 
  207   Sun Jul 13 17:46:28 2014 KojiOpticsCharacterizationOMC backscatter measurementBackscattering
reflectivity of the 3rdOMC was measured.

Attached: Measurement setup
 OMC_backscatter.pdf 
  208   Tue Jul 15 03:00:42 2014 KojiOpticsCharacterizationOMC backscatter measurementPresence of the misaligned SRM (T=20%)
was forgotten in the previous entry.
This effectively reduces the OMC reflectivity
  
  209   Tue Jul 15 03:34:16 2014 KojiOpticsCharacterizationOMC backscatter measurementBackscatter
measurement ~ 2nd round


Summary
 OMC_backscatter.pdfOMC_backscatter.png 
  191   Fri Jun 27 12:29:50 2014 KojiGeneralGeneralOMC bakingThe OMC went into the oven at around 2PM
on Thursday. It will be baked at 80degC for
48 hours.
 P6266536.jpg 
  193   Wed Jul 2 16:41:43 2014 KojiGeneralGeneralOMC bakingOMC is back from the oven today.
To Do:
Optical tests
  
  27   Tue Oct 16 14:50:54 2012 jamie, jeffGeneralGeneralOMC breadboard/plate measurement dimensionsWe have measured the dimensions and mass
of the OMC glass plates/breadboards:

  
  80   Mon Mar 25 18:34:25 2013 KojiGeneralGeneralOMC building plan / procedure ~ Mar 25 Mon25 March (Mon): 
Inspect the test PZT assembly

    => Give it to Bob. 
  
  83   Wed Mar 27 20:54:45 2013 KojiGeneralGeneralOMC building plan / procedure ~ Mar 26 Mon26 March (Tue):
- Curved mirror characterization
(Koji, done)
  
  84   Wed Mar 27 20:54:54 2013 KojiGeneralGeneralOMC building plan / procedure ~ Mar 27 Wed27 March (Wed)
- AOM drift investigation (Lisa,
Zach)
  
  85   Wed Mar 27 20:55:10 2013 KojiGeneralGeneralOMC building plan / procedure ~ Mar 28 Thu28 March (Thu): 

    Rebuild the bottom template
in the lab
    Place the bottom
  
  79   Mon Mar 25 02:04:05 2013 KojiGeneralGeneralOMC building plan / procedure ~ WB18WB 18 March 

    Diode test
    
        Dark current
  
  135   Mon Jun 3 18:58:08 2013 KojiOpticsConfigurationOMC final tests- QPD mount aligned, QPD output checked
  The spots are with 100um from
the center of the diodes. [ELOG
  
  346   Thu Apr 18 20:47:54 2019 JoeOptics OMC initial alignment and locking[Joe, Phillip, Koji, Stephen]

*draft post, please add anymore
info if I missed something*
 IMG_7676.JPGIMG_7666.JPGIMG_7670.JPGIMG_7883.JPGIMG_7882.JPG 
  349   Fri Apr 19 11:34:19 2019 KojiOptics OMC initial alignment and lockingThe spot on CM1 was found displaced by
3.4mm (horiz.) and 3.0mm (vert.)
in the upper right direction looking from
 misalignment1.pdf 
  119   Fri May 3 21:09:08 2013 KojiGeneralGeneralOMC is backL1 OMC is back on the table for the action
next week.
  
  128   Mon May 20 14:59:21 2013 KojiGeneralGeneralOMC is out from the ovenThe OMC came back to the table again.
No obvious change is visible: no
crack, no delamination
  
  345   Wed Apr 17 10:30:37 2019 PhilipOpticsGeneralOMC optical set-up day 1[Joe, Koji, Liyuan, Philip, Stephen]
Work done on 16.04.2019
  
  272   Wed Dec 7 21:18:35 2016 KojiGeneralGeneralOMC placed on the table / the beam roughly alignedThe OMC mode matching sled was fixed on
the nominal part of the table. Then the OMC
was located at the nominal position marked
 DSC_0082.jpgDSC_0084.jpg 
  273   Thu Dec 8 21:17:09 2016 KojiGeneralGeneralOMC placed on the table / the beam roughly alignedThe OMC cavity was locked. The alignment
was precisely adjusted. The mode matching
was optimized by the lens positions. The
  
  197   Sun Jul 6 02:46:20 2014 KojiOpticsCharacterizationOMC power budget3rd OMC power budget (2014/7/2)
Input power: 34.8mW
  
  354   Wed Apr 24 13:58:51 2019 JoeOpticsCharacterizationOMC power budget and UV Epoxy Bonding of BS1[koji,philip,joe,liyuan,stephen]

need to add spot positions.

Mirrors: PZT11,PZT22, A14, A5
  
  181   Tue Mar 25 17:10:10 2014 KojiOpticsCharacterizationOMC spot position estimationSpot positions were inferred from the photos  OMC_spot.pdf 
  320   Thu Mar 28 16:36:52 2019 KojiMechanicsCharacterizationOMC(002) PZT characterization As
performed in the ELOG 202, the PZTs of
the OMC 002 were tested.
 PZT_Scan.pdfOMC_PZT_Response.pdf 
  323   Fri Apr 5 01:08:17 2019 KojiOpticsCharacterizationOMC(002): DCPD / QPD alignmentThe beam height in the cavity became totally
different from the previous one and the shims
needed to be much thicker than before. This
 IMG_7521.JPGIMG_7529.JPGIMG_7539.JPGIMG_7541.JPG 
  324   Fri Apr 5 20:50:54 2019 KojiOpticsCharacterizationOMC(002): QPD alignmentQPD#             
QPD1      
QPD2
 P_20190405_215906.jpgP_20190405_215927.jpg 
  322   Fri Apr 5 01:07:18 2019 KojiOpticsCharacterizationOMC(002): transmitted beam imagesThere was a concern that the transmission
from CM1 has additional fringes. The shape
of the transmitted beams from CM1, CM2, and
 CM1trasns.pngCM2trasns.pngFM2trans2.png 
  339   Tue Apr 16 16:40:26 2019 KojiGeneralConfigurationOMC(004): A Mirror selectionWe are going to use A5 and A14
for FM1 and FM2. (The role of these
two can be swapped)
 A_Mirror_selection.pdf 
  340   Tue Apr 16 16:52:36 2019 KojiOpticsConfigurationOMC(004): B Mirror selectionWe are going to use B6 for the
DCPD BS (BS2), and B1 for the QPD BS (BS3).
Their role can not
 B_Mirror_selection.pdf 
  341   Tue Apr 16 17:24:56 2019 KojiOpticsConfigurationOMC(004): E Mirror selectionWe are going to use E6, E9, E11, and E14
for BS1, SM1, SM2, and SM3. They (and E18)
are all very similar.
 E_Mirror_selection.pdf 
  338   Tue Apr 16 16:35:09 2019 KojiOpticsConfigurationOMC(004): Glass breadboard selectionD1200105 SN006 was selected as
the breadboard for OMC(004).
The reason is the best parallelism
 BB_selection.pdf 
  330   Thu Apr 11 21:22:58 2019 KojiGeneralGeneralOMC(004): PZT sub-assembly air baking[Stephen Koji]

The baking of the PZT subassemblies
was more complicated than we initially thought.
 temp_profile.pdfbake.xlsx 
  329   Thu Apr 11 21:22:26 2019 KojiMechanicsGeneralOMC(004): PZT sub-assembly gluing[Koji Stephen]

The four PZT sub-assemblies were
glued in the gluing fixtures. There were
 IMG_7561.jpgIMG_7567.jpg 
  378   Mon Sep 23 21:29:51 2019 KojiOpticsGeneralOMC(004): PZT sub-assembly gluing (#9/#10)[Stephen, Shruti, Koji]

We worked on the gluing of the
PZT sub-assy (#9 and #10) along with the
 IMG_8933.jpgIMG_8934.jpg 
  381   Mon Sep 30 23:16:53 2019 KojiOpticsGeneralOMC(004): PZT sub-assembly gluing (#9/#10)Friday: [Stephen, Koji]

As the oven setting has qualified,
we brought the PZT assys in the air bake
 IMG_8950.jpegIMG_8953.jpegIMG_8954.jpegIMG_8955.jpeg 
  331   Sun Apr 14 23:58:49 2019 KojiGeneralGeneralOMC(004): PZT sub-assembly post air-bake inspection[Koji Stephen]

(Friday afternoon) We retrieved
the PZT sub-assemblies to the clean room.
  
  335   Mon Apr 15 01:23:45 2019 KojiGeneralGeneralOMC(004): PZT sub-assembly post air-bake inspection (Sub-assy #10) Sub-ASSY
#10

Attachment #1: Mounting
 IMG_7589.jpgIMG_7590.jpgIMG_7591.jpgIMG_7592.jpg 
  332   Mon Apr 15 00:08:32 2019 KojiGeneralGeneralOMC(004): PZT sub-assembly post air-bake inspection (Sub-assy #7)Sub-ASSY
#7

Probably the best glued unit among
 6x 
  333   Mon Apr 15 00:39:04 2019 KojiGeneralGeneralOMC(004): PZT sub-assembly post air-bake inspection (Sub-assy #8)Sub-ASSY
#8

Probably the best glued unit among
 8x 
  334   Mon Apr 15 01:07:30 2019 KojiGeneralGeneralOMC(004): PZT sub-assembly post air-bake inspection (Sub-assy #9)Sub-ASSY
#9

The most fractured unit among four.
 7x 
  336   Mon Apr 15 21:11:49 2019 PhilipOpticsCharacterizationOMC(004): PZT testing for spare OMC[Koji, Philip]

Today we tested the functionality
of the four remaining PZTs (11,12,13 and
  
  337   Tue Apr 16 11:36:36 2019 KojiOpticsCharacterizationOMC(004): PZT testing for spare OMCAttachment 1: Shadow sensor
setup for the PZT displacement test

Attachment 2:
 9x 
  342   Tue Apr 16 21:16:11 2019 KojiOpticsCharacterizationOMC(004): PZT testing for spare OMCAfter having dug into the past email, it
turned out that these wires were the ones
already replaced from the original teflonwires.
  
  360   Thu May 9 18:10:24 2019 KojiOpticsCharacterizationOMC(004): Spot position scan / power budget(Now the CCD image is captured as a movie
and the screen capture is easier!)

Various spot positions
 190508.pngscattering_spots_CM1.png 
  350   Sat Apr 20 00:50:12 2019 KojiOpticsCharacterizationOMC(004): Spot positionsSimilarly to OMC
ELOG 349 the spot positions after the
replacement of CM2 were measured (Attachment
 misalignment2.pdfmisalignment3.pdf 
  356   Wed May 1 15:40:46 2019 KojiOpticsCharacterizationOMC(004): Spot positions and the scatteringTried a few things.

1. Replaced CM1 (PZT ASSY
#10=M21+PZT#22+C12) with PZT ASSY #7 (=M1+PZT#13+C13)
 misalignment.pdf 
  357   Fri May 3 11:06:28 2019 KojiOpticsCharacterizationOMC(004): Spot positions and the scatteringExperiment on 5/1
- CM1 right knob was moved 1div (10um)
backward such that the spots were better
 misalignment.pdf 
ELOG V3.1.3-